In the mid-1870s the Pinkerton Detective Agency’s fame was growing, and founder Allan Pinkerton began to pen bestselling books that promoted his and the agency’s crime-fighting image even more. But after Pinkerton died in 1884, his sons took over and expanded the business, providing guards and watchmen to protect railroads, mines, and factories. By the early 1900s, Pinkertons had become feared labor spies and strike-busters. It wasn’t long before their brutal and deadly methods began to attract scrutiny from the press and federal regulators.Pre-order your copy of the new American History Tellers book, The Hidden History of the White House, for behind-the-scenes stories of some of the most dramatic events in American history—set right inside the house where it happened.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.